Improvement in hot-air furnaces



R. F. BROWN.

HoT Am FURNAcEs.

Patented Nov. ze, 1876.

4N ca.184,829.

UNITED STATES PATENT OFFICE.

ROYAL F. BROWN,OF CHICAGO, ILLINOIS.

IMPROVEMENT IN HOT-AIR FURNACES.

Speciiication forming part of Letters Patent No. 184,829, dated November28, 1876; application filed July 1, 1876.

` Chicago, in the county of Cook and State of Illinois, have invented anImprovement in Hot- Air Furnaces, of which the following is aspecification The nature of my invention relates to an improvement insurface-burning air-heating furnaces of that class wherein the gaseousproducts of combustion are conducted by divinglues into base-dues,thence by ascending ues into the direct iiue, into which the gas/may beallowed to pass directly, it' desired; and it consists in the peculiarconstructipandcombination of the several parts, asvm'ore fullyhereinafter set forth.l

vFigure l is a perspective view of the furnace with the casing removed.Fig. 2 is a partial front perspective view, showing the manner ofsupporting the grate-lever. Fig. 3 is a vertical section at x w in Fig.4, which is a horizontal section at y y.

In the drawing, A represent-s the ash-pit, having a circular opening inthe top, in which is hung a rotary grate, B, on a trunnion-bar, a. Thegrate is cast with a stationary lever, b, projecting to the front, whichlever is supported by a segmen t-shaped bar, c, hinged at one end to theside wall of the ash-pit, while the other end is received in, andsupported by, a socket-bracket, d, cast on the other side wall. When itis desired to tilt or dump the grate the bar c is swung out to one side,when the bar b may be lowered. C is the fire-pot,

snrmounted by a hollow combustion-ring', D,

triangular in crosssection, and perforated just under the inner angle,as shown. The air to promote the combustion of the gases enters the ringthrough a throat, c, which may be tted with the usual register. E is thecombustion-chamber, mounted on the ring D, and is fitted with the usualfeed-door in front and exit-nue F at the back, inwhich there is hung adamper, f. lwo shortjlateralfiues at the top of the com bustion-chaniberconvey the gases into diving-dues Gr Gr, one at each side, whiohdeliverthe gases intoth front end ot' a segment-shaped base-flue, H, at therear end of which rises an ascending iiue, I, which conveys the gasesinto a cross-lue,.J, at the back of the furnace, and from which risesthe main exit-due F', which is intersected by the direct-draft flue F.When the damper in the latter is closed the heated gases pass down thediving-dues into the base-fines. Passing through these they rise throughthe ascending lines into the cross-flue before finding an eXit at agreatly-reduced temperature, owing to the large area ofradiating-surface which they have traversed.

What I claim as my invention is In an air-heating furnace, substantiallyas described, the combination of the diving and ascending lues and baseand cross lues with the ash-pit, grate, iire-pot, combustion-rin g, andcombustioncharnber, substantiallyv as set forth. v

EoYAL E. BEowN. y

Witnesses:

WM. H. LoTz, EMIL H. FROMMANN.

